Rubber Conveyor Belt Catalogue

World Prime Services Antistatic Conveyor Belt is engineered for industrial conveying systems where controlled dissipation of electrostatic charge is required. The belt uses electrically conductive or static-dissipative rubber compounds and a compatible carcass construction to reduce the buildup of static electricity generated by belt movement, friction with the conveyed material and contact with conveyor components.

The product platform is intended for coal handling, power generation, ports, cement, mineral processing, chemical handling, recycling and other industrial bulk-material applications. Antistatic performance can be combined with abrasion, impact, oil, heat or flame resistance where required by the duty.

Friction between the belt, pulleys, idlers and the conveyed material can generate electrostatic charge. An antistatic belt is formulated so that accumulated charge can dissipate through a controlled conductive path rather than remaining concentrated on the belt surface.

ISO 284:2025 specifies the maximum electrical resistance of a conveyor belt and the corresponding test method, with the objective of ensuring the belt is sufficiently conductive to prevent electrostatic-charge buildup during service. A commonly referenced antistatic criterion for industrial conveyor belts is electrical resistance ≤ 3 × 10⁸ Ω when tested per the applicable ISO 284 procedure. Final acceptance criteria must be defined in the purchase specification.

Antistatic performance is achieved through the rubber formulation, not merely a surface treatment. Conductive ingredients are incorporated into the compound to provide controlled electrical resistance while maintaining the mechanical properties required for conveying service.

Electrical resistance must be verified on representative belt samples, using the procedure required by the applicable standard or the customer specification. ISO 284:2025 is the current international standard covering the electrical conductivity of conveyor belts and its test method.

Important: an antistatic belt is only one element of electrostatic risk control. Conveyor structures, pulleys, idlers, bearings, grounding/bonding, material properties, dust concentration, humidity and local safety regulations must also be considered.

• Conveyed material and bulk density
• Maximum lump size and particle characteristics
• Belt width, speed, center distance and inclination
• Required tensile strength and operating tension
• Ambient and material temperature
• Presence of oil, chemicals, heat, flame or dust hazards
• Required electrical resistance limit and current standard
• Grounding and bonding arrangement
• Local hazardous-area or fire-safety requirements, where applicable

Correct installation is essential to preserving mechanical performance and electrical continuity. The conveyor system should be inspected for grounding/bonding, pulley and idler condition, belt tracking and splice integrity before commissioning.

Splicing

• Use an approved splice design for the selected carcass.
• Use splice materials compatible with the antistatic compound.
• Verify electrical behavior where required by the project specification.

System Grounding

• Verify conductive continuity of the conveyor structure per site procedures.
• Inspect grounding connections and bonding jumpers.
• Prevent contamination, paint or corrosion from compromising the intended grounding paths.

Commissioning

• Confirm belt tension and tracking.
• Check scrapers and skirt seals.
• Record baseline electrical and mechanical inspection data where required.

Reference Standards

Specifications may be developed with reference to ISO 284:2025 for electrical conductivity, together with applicable construction standards such as ISO 14890 for textile conveyor belts and ISO 15236 for steel cord conveyor belts. Where flame resistance, underground mining or potentially explosive atmospheres are involved, the project specification must also define the applicable local and international safety requirements.

World Prime Services Chemical-Resistant Conveyor Belt is engineered for continuous conveying of bulk material where acids, alkalis, salts, fertilizers, process chemicals or chemically contaminated materials can cause premature degradation of conventional rubber belts.

The product concept combines a chemically resistant cover compound with a compatible adhesion system and a high-strength textile or steel cord carcass. The primary objective is to reduce swelling, softening, hardening, cracking, blistering, loss of adhesion and chemical penetration while maintaining the mechanical properties required for industrial conveying.

Chemical resistance is governed by the interaction between the elastomer, the chemical medium and the operating conditions. Chemical identity alone is not sufficient for belt selection: concentration, temperature, exposure duration, wet or dry contact, mixture composition and mechanical abrasion must all be evaluated.

No single rubber compound is universally resistant to all acids, alkalis, oils, solvents and oxidizing agents. Final selection must therefore be based on real service data and, for severe or unknown media, on laboratory compatibility testing.

The values below form a catalog engineering envelope. Final dimensions, carcass strength, cover thickness and compound are confirmed in the approved technical quotation.

Required Chemical Data

• Exact chemical name and mixture composition
• Minimum, normal and maximum concentration
• Continuous and peak temperature
• Dry, damp, wet, slurry-type or immersion-type contact
• Duration and frequency of contact
• Presence of oil, solvent or oxidizer
• Cleaning chemicals used on the conveyor
• Safety Data Sheet (SDS) for proprietary mixtures

1. Identify the exact chemical or chemical mixture.
2. Define the operating concentration and temperature.
3. Establish the exposure mode and contact duration.
4. Evaluate abrasion, impact and lump size independently of chemical resistance.
5. Calculate the required carcass tensile strength from the conveyor design.
6. Select top and bottom cover thickness based on mechanical and chemical exposure.
7. Define edge protection and splicing system.
8. Validate severe or unknown chemical combinations through laboratory testing.

Splicing

• Hot-vulcanized splicing is preferred for critical chemical service.
• Splice rubber and cement systems must be chemically compatible with the conveyed medium.
• Steel cord splice geometry must follow the approved belt-strength design.
• Splice edges must be fully sealed against chemical penetration.

Installation

• Inspect pulley alignment and idler rotation before commissioning.
• Avoid belt damage during pulling and handling.
• Use chemically compatible sealing and cleaning systems.
• Avoid unapproved solvents or cleaners during maintenance.

For severe applications, compatibility programs may compare mass or volume change, hardness, tensile strength, elongation and visual condition before and after controlled chemical exposure.

The general conveyor-belt construction standard does not by itself certify compatibility with a specific chemical. Chemical resistance must be defined by the selected compound and validated against the actual operating medium.

World Prime Services Cold-Resistant Conveyor Belt is engineered for conveying bulk material in sub-zero environments, where conventional rubber compounds can stiffen, lose elasticity, crack or become vulnerable to impact damage. The product platform uses specially formulated low-temperature rubber covers, combined with textile or steel cord carcasses selected for the required tension, distance and duty.

Typical applications include outdoor conveyors in freezing climates, open-pit mines, coal handling systems, winter ports and terminals, power plants, cold-storage facilities, quarries and long-distance bulk-material systems operating under severe low-temperature exposure.

Rubber becomes progressively stiffer as temperature drops. In severe cold, an unsuitable conveyor belt cover can lose flexibility, develop surface cracking and transfer higher dynamic stress to the carcass and splice. Cold-resistant belts use elastomer systems selected to maintain elasticity and impact behavior at reduced temperatures.

Industry references commonly describe cold-resistant covers using natural rubber (NR) and butadiene rubber (BR)-based blends, due to their low-temperature flexibility and impact characteristics. Extreme-service products are frequently divided into cold-service classes around -45°C and -60°C. Final suitability depends on the actual belt temperature, ambient conditions, wind exposure, material temperature, idle periods and startup method.

Cold-resistant conveyor belt compounds are formulated to reduce low-temperature hardening and preserve the dynamic properties needed for troughing, pulley flexing, impact absorption and splice reliability. Compound selection must balance cold flexibility with abrasion resistance, tensile properties, aging resistance and the actual conveyed material.

Temperature classes are indicative engineering categories. The minimum acceptable service temperature must be confirmed in the technical quotation. Belt surface temperature can differ from ambient temperature due to material temperature, friction, solar exposure, wind-chill effect and stoppage duration.

The values below are industry-representative reference values for cold-resistant cover compounds and are included only as an engineering guide. Final guaranteed properties must be stated in the approved product specification.

Specific values vary by cover grade and standard. For abrasive cold-service applications, stronger H- or D-type cover performance may be specified separately from the low-temperature requirement.

1. Define the minimum ambient temperature and the minimum expected belt temperature.
2. Identify whether the conveyor starts after a prolonged cold stoppage.
3. Record the conveyed material temperature and whether frozen lumps may be present.
4. Calculate belt tension and select the EP, NN or steel cord carcass.
5. Define abrasion, impact, oil, flame or tear-resistance requirements independently.
6. Select top and bottom cover thickness based on wear and impact service.
7. Verify minimum pulley diameters and transition geometry for the selected carcass.
8. Specify low-temperature compatible splice materials and vulcanization procedure.
9. Confirm conveyor startup torque, take-up behavior and idler condition for extreme cold service.

Splicing

• Hot-vulcanized splicing is recommended for critical cold service and steel cord applications.
• Splice compounds must be compatible with the minimum operating temperature.
• Vulcanization conditions must follow the approved procedure and compensate for low installation ambient temperatures, where necessary.
• Steel cord splice geometry must match the selected belt strength and cord arrangement.

Installation & Commissioning

• Store belt rolls per approved low-temperature handling procedures.
• Avoid sharp bending or impact on extremely cold belt rolls before installation.
• Verify that idlers rotate freely and pulley surfaces are free of ice.
• Commission with controlled loading where practical and confirm tracking before full capacity.

Belt construction and acceptance may be specified per internationally recognized conveyor belt standards, together with project-specific low-temperature requirements. The applicable standard and its edition must be stated in the purchase specification.

A general conveyor-belt construction standard does not by itself guarantee suitability at -45°C or -60°C. The minimum operating temperature and required cold-service class must be explicitly included in the technical purchase specification.

World Prime Services Bucket Elevator Belt is engineered for continuous or steep-incline vertical lifting of material, where buckets are mechanically fixed to the belt. The belt is designed to carry continuous vertical tension load, repeated flexing at the pulleys, stress concentrated around the bucket bolt holes, dynamic loading and the combined suspended mass of the belt, buckets and conveyed material.

The product range includes reinforced EP and NN fabric constructions, as well as steel cord elevator belts for high-lift, high-capacity, low-elongation service. Depending on the application, construction may incorporate tear-resistant reinforcement, reinforced bucket-fixing zones and special cover compounds resistant to abrasion, heat, oil, flame or static charge.

Buckets are fixed to the elevator belt at defined pitches. Bulk material is loaded at the boot section, captured by the buckets and lifted vertically to the head pulley, where it is discharged by centrifugal action or by gravity, depending on the elevator design.

Unlike a conventional horizontal belt, a bucket elevator belt continuously carries the suspended weight of the belt, buckets and material. The belt is also subjected to concentrated fixing forces, repeated flexing at the head and boot pulleys, and dynamic tension variations. Carcass selection, pulley diameter, bucket pitch and take-up design are therefore critical.

EP fabric is widely used in bucket elevator belts because it combines relatively low elongation with good dimensional stability, fatigue resistance and rubber adhesion. Multi-ply constructions distribute the bucket loads and provide good resistance to repeated flexing at the pulleys.

Steel cord bucket elevator belts are selected when lift height, bucket weight or material density generate tensile loads beyond practical textile constructions. Steel cords provide very high tensile strength and low elongation, improving bucket pitch consistency and limiting take-up travel.

*Industry-indicative reference values. The final pulley diameter must be confirmed per the approved belt construction and elevator design.

• Bucket bolt holes create local stress concentrations and can initiate tears if the belt is overloaded, misaligned or damaged.
• Reinforced bolt-hole zones improve local load distribution.
• Transverse textile or steel reinforcement can help limit longitudinal tear propagation.
• High-adhesion skim rubber improves load transfer between the reinforcement layers.
• Bucket bolt diameter, washer area, hole pitch and edge distance must match the approved belt and bucket design.

Elevator capacity depends on bucket width, bucket volume, bucket pitch, belt speed, fill rate and discharge efficiency. Belt strength must be selected from the maximum operating tension, not from throughput alone.

*Industry reference figures for engineering comparison purposes only. Actual throughput depends on bucket geometry, pitch, belt speed, material density and fill behavior.

• Determine the elevator height and center distance.
• Calculate the suspended mass of the belt, buckets and material.
• Define the maximum operating tension and safety factor.
• Select the EP/NN fabric or steel cord carcass.
• Confirm the minimum head and boot pulley diameters.
• Specify bucket size, pitch, row arrangement and bolt pattern.
• Evaluate heat, oil, chemical, flame, antistatic and abrasion requirements.
• Assess tear risk around the bucket-fixing zones.
• Define the splice or endless-joining method.

• Hot-vulcanized endless splicing is preferred where maximum belt continuity is required.
• Mechanical fixing systems must distribute load across the full belt width.
• Steel cord elevator splices require approved cord arrangement and fixing/vulcanization design.
• Bucket hole patterns must not interfere with the splice reinforcement.
• Critical elevators require frequent splice inspection.

• Verify head and boot pulley alignment before belt installation.
• Confirm elevator casing clearances and bucket travel path.
• Install the buckets using the approved bolt pattern and torque.
• Adjust take-up tension per the engineering specification.
• Rotate the system manually or at low speed before commissioning under load.
• Check tracking, bucket clearance, splice condition and pulley traction.
• Increase load progressively while monitoring temperature, vibration and tension.

Bucket elevator belts must be dedicated engineered as part of the complete elevator system, since concentrated fixing loads and continuous vertical tension cannot be evaluated from the belt's nominal tensile strength alone.

World Prime Services Endless Conveyor Belt is supplied as a continuous, closed-loop rubber conveyor belt, eliminating the need for a field splice in the finished belt loop. This construction is intended for conveyor systems where reduced splice-related maintenance, smooth running, dimensional consistency and reliable continuous service are priorities.

Endless conveyor belts can be manufactured in EP or NN textile constructions and can be supplied with smooth, patterned, chevron or application-specific covers. Special compounds can be selected for abrasion, heat, oil, chemical, cold, antistatic or flame-retardant service.

A true endless conveyor belt is manufactured or vulcanized as a closed loop to the specified net endless length. Because the belt is delivered as a continuous loop, installation requires access around the conveyor pulleys or a machine design that allows belt fitting without cutting.

For textile endless belts, net-length determination can be specified per ISO 16851:2012, which defines a method for determining the net length of a spliced endless textile conveyor belt. This standard does not apply to steel cord constructions.

Precise net endless length is essential, since the belt must fit the conveyor geometry and remain within the available take-up range. The purchase specification must define the required net length, the measurement method, the belt tension condition during measurement and the acceptable tolerance.

• Reduced dependence on field-splice quality.
• Smooth passage over pulleys and idlers.
• Lower risk of splice opening in properly selected applications.
• Consistent belt geometry and continuous carcass behavior.
• Suitable for compact machinery where a permanent endless loop is preferred.
• Useful for specialized conveying equipment, feeders, mobile units and process machinery.

Important: a truly endless belt can be more difficult to install on conveyors that cannot be opened or disassembled. Installation access must be assessed before ordering.

• Define the exact conveyor pulley center distance and take-up range.
• Specify the net endless length and measurement method.
• Calculate the operating tension and select the carcass strength.
• Confirm the minimum pulley diameters for the selected textile construction.
• Select the smooth or profiled top surface.
• Specify abrasion, heat, oil, chemical, cold, antistatic or flame requirements.
• Confirm the conveyor can physically accept a closed-loop belt during installation.

• Verify conveyor access before removing the existing belt.
• Inspect pulley, idler and structure alignment.
• Fit the endless loop without sharp bending or twisting.
• Set the initial tension within the approved operating range.
• Rotate the conveyor manually or at low speed before full commissioning.
• Increase load progressively while checking tracking and take-up position.

• Ensure the drive and tail pulleys are square with the conveyor centerline.
• Replace seized or misaligned idlers.
• Keep loading centered on the belt.
• Avoid excessive tension as a substitute for correcting tracking problems.
• Check pulley lagging condition and material buildup.
• Record the take-up position after commissioning for future inspection.

ISO 16851 applies to endless textile conveyor belts and excludes steel cord constructions. The final belt construction and acceptance criteria must be defined in the approved purchase specification.

World Prime Services Transmission Belt is a heavy-duty rubber and fabric flat belt engineered for friction-based mechanical power transmission between rotating pulleys. The belt transfers torque from a drive pulley to a driven pulley through controlled belt tension, wrap angle and friction at the pulley interface.

The construction uses high-strength textile reinforcement bonded to durable rubber compounds to provide flexibility, dimensional stability, fatigue resistance and reliable frictional grip. The product is suitable for industrial equipment such as fans, blowers, pumps, agricultural machinery, workshop machines, process drives and selected heavy-duty power transmission systems.

Flat transmission belts operate by friction between the belt and pulley surfaces. The difference between the tight-side tension and the slack-side tension produces the effective tangential force that transmits mechanical power. System capacity is influenced by belt speed, pulley diameter, wrap angle, coefficient of friction, pre-tension and allowable belt tension.

Correct pulley alignment and appropriate tension are essential. Excessive tension increases bearing loads and belt fatigue, while insufficient tension can cause slippage, heat generation, pulley surface polishing and unstable speed transmission.

The values below represent a catalog engineering envelope. Final belt width, thickness, carcass strength and cover construction are confirmed per the pulley geometry, required power and operating speed.

Power transmitted by a flat-belt system depends on the effective tension difference and belt speed. Final belt design must be selected from the actual drive power, pulley diameters, rotational speed, center distance, service factor and starting load.

• Define the motor power and maximum transmitted load.
• Record the drive and driven pulley diameters.
• Record the pulley rotational speeds and required speed ratio.
• Measure the center distance and available take-up adjustment.
• Confirm the pulley face width and preferred belt width.
• Select the EP, NN or reinforced textile carcass.
• Define the required friction surface and edge construction.
• Specify the operating temperature, oil exposure, dust and static-control requirements.

• Verify that the drive and driven shafts are parallel.
• Ensure pulley faces are clean, smooth and free of harmful burrs.
• Install the belt without twisting or sharp bending.
• Align the pulleys before applying final tension.
• Verify that the belt width is compatible with the pulley face width.
• Operate the drive unloaded at low speed and confirm stable tracking before full load.

• Apply only the pre-tension necessary to avoid slippage under maximum operating load.
• Do not over-tension the belt to correct pulley misalignment.
• Use appropriate pulley crowning and alignment practices for flat-belt drives.
• Re-check belt tension after initial run-in.
• Monitor bearing temperature after tension adjustment.
• Correct oil contamination or pulley polishing if slippage occurs.

Transmission belt designs may reference international pulley and belt standards, where applicable. Since many legacy flat-belt dimensional standards have been withdrawn, final design dimensions must be agreed directly between buyer and supplier and validated against the actual drive system.

The current ISO catalog shows several historical flat transmission-belt dimensional standards, including ISO 22, ISO 63, ISO 99 and ISO 100, as withdrawn. This catalog therefore treats dimensions as project-specific engineering data, rather than presenting obsolete ISO dimensional limits as current requirements.

World Prime Services Fire-Resistant Steel Cord Conveyor Belt is engineered for high-tension, long-distance and heavy-load bulk-material conveying where fire performance and operational safety are critical design requirements.

The belt combines longitudinal high-tensile steel cords with fire-resistant rubber cover compounds and a high-adhesion skim system. Depending on the application, the construction may also incorporate antistatic properties, transverse breakers, rip-protection layers and special safety-qualified rubber systems for underground or other regulated installations.

Fire-resistant steel cord belting is designed to combine the mechanical advantages of a steel cord tension member with cover and skim compounds formulated for reduced flammability. Fire behavior must be evaluated using the governing standard and the exact service category.

Fire resistance does not mean that the belt is non-combustible. It means the belt is engineered to meet defined flame-test, flame-propagation or related safety requirements. Where dust, coal, combustible material or underground operation is involved, antistatic and other safety properties may also be mandatory.

FR-ST-G Series — Flame-Resistant Steel Cord Belt for General Use. Designed for aboveground coal washeries, power plants, bulk terminals and selected non-coal underground or industrial applications where fire-resistant performance is required by the project specification.

FR-ST-U Series — Flame-Resistant Steel Cord Belt for Underground Use. Special safety-oriented construction for underground installations where applicable regulations require flame-resistant and related safety properties.

FRAS-ST Series — Fire-Resistant & Antistatic Steel Cord Belt. Combines flame-resistant rubber with controlled electrical resistance for static-charge dissipation.

FR-AR-ST Series — Fire-Resistant Anti-Rip Steel Cord Belt. Adds transverse breaker or anti-rip reinforcement for sharp, heavy or penetrating materials.

FR-X Series — Engineered Safety-Critical Steel Cord Belt. Project-specific configuration combining fire resistance with high tension, special cover thickness, rip protection, monitoring systems or other site requirements.

Steel cord reinforcement provides very high tensile strength with low operational elongation, making it suitable for long center distances, high capacities and high belt tensions. Cord diameter, pitch, construction and adhesion system are selected from the required nominal belt strength and splice design.

Compound selection must consider flame performance together with abrasion, temperature, oil contamination, weather exposure and electrical-resistance requirements.

Underground use should never be inferred from a general FR designation alone. The exact underground approval, standard and local regulatory requirement must be stated in the purchase specification.

Actual preferred classes and dimensional requirements should be selected according to the applicable ISO 15236 series or customer-approved design specification.

A current industrial tender example for an ST 1600 FRAS steel cord belt specified 10 mm top cover, 5 mm bottom cover, electrical surface resistance not exceeding 300 megaohms and compliance references to DIN 22131 / ISO 15236. Such values are application-specific examples and should not be treated as universal catalogue guarantees.

• Define whether the conveyor is aboveground, underground or in another regulated environment.
• Specify the required fire-resistance and antistatic standards.
• Calculate maximum operating tension and select ST strength class.
• Define belt width, speed, center distance and drive arrangement.
• Specify top and bottom cover thickness.
• Assess abrasion, impact and rip risk.
• Define whether transverse breaker or rip-stop reinforcement is required.
• Confirm pulley diameters, take-up travel and splice design.
• State all required statutory approvals before manufacture.

Steel cord flame-resistant conveyor belts require engineered hot-vulcanized splices. Splice length, step arrangement, cord layout and splice materials depend on the belt strength class and the applicable standard.

• Use flame-resistant splice compounds compatible with the parent belt.
• Maintain the approved steel cord stagger and overlap geometry.
• Control vulcanizing temperature, pressure and cure time.
• Perform splice inspection before commissioning.
• Use periodic splice monitoring on critical long-distance conveyors.

• Verify pulley alignment and conveyor structure before belt installation.
• Protect the belt from sharp structural damage during pulling.
• Use approved handling methods for large steel cord belt rolls.
• Set take-up tension to the engineered value.
• Commission unloaded or at reduced load where practical.
• Check tracking, drive traction, splice condition and safety devices.
• Verify antistatic grounding and site fire-protection systems where applicable.

Project specifications should identify the exact standard edition and any local mining, underground or fire-safety approval. General-use FR belts and underground-approved belts are not automatically interchangeable.

World Prime Services Flame-Retardant Conveyor Belt is engineered for bulk-material handling systems where reduced flammability, controlled flame behavior and operational fire safety are critical design requirements.

The product range includes textile-reinforced constructions for general industrial service and project-specific configurations for mining, coal, power generation, ports and other environments where flame-retardant or flame-retardant-antistatic performance is specified. Depending on the duty, the belt may also incorporate abrasion resistance, impact resistance, antistatic performance and transverse anti-rip reinforcement.

Flame-retardant conveyor belting uses specially formulated rubber compounds designed to reduce flame persistence and propagation after exposure to a defined ignition source. Performance must be verified using the applicable standard and test method.

Flame retardance does not mean that the belt is non-combustible. It means the belt is engineered to satisfy defined laboratory-scale flammability requirements. In coal, dust-sensitive or other hazardous environments, electrical conductivity and static-charge control may also form part of the safety specification.

FR-EP Series — Flame-Retardant EP Fabric Conveyor Belt. Low-elongation EP fabric construction for heavy-duty general industrial conveying where flame-retardant performance is specified.

FR-NN Series — Flame-Retardant Nylon Fabric Conveyor Belt. Flexible textile construction for impact-oriented applications requiring flame-retardant cover properties.

FRAS Series — Flame-Retardant & Antistatic Conveyor Belt. Combines controlled flammability with electrical conductivity for static-charge dissipation.

FR-AR Series — Flame-Retardant Anti-Rip Conveyor Belt. Adds breaker or transverse reinforcement for sharp, heavy or penetrating materials.

FR-X Series — Engineered Safety-Critical Conveyor Belt. Project-specific configuration for regulated, underground or special fire-risk environments requiring defined certification or statutory approval.

Compound selection must evaluate flame performance together with abrasion, temperature, oil contamination, weather exposure and electrical-resistance requirements.

Underground suitability should never be inferred from a general FR designation alone. The exact regulatory approval, test standard and local statutory requirement must be stated in the purchase specification.

ISO 340:2022 applies to conveyor belts with textile carcasses as well as steel cord conveyor belts and specifies a laboratory-scale method for assessing reaction to an ignition flame source. ISO 284:2025 specifies maximum electrical resistance and the corresponding test method for conductivity.

• Define whether the conveyor is surface, underground or otherwise regulated.
• Specify the required flame-retardance and antistatic standards.
• Calculate operating tension and select EP, NN or steel-cord carcass.
• Define belt width, speed, center distance and drive arrangement.
• Specify top and bottom cover thickness.
• Assess abrasion, impact and rip risk.
• Define whether breaker or anti-rip reinforcement is required.
• Confirm pulley diameters, take-up travel and splice design.
• State all required statutory approvals before manufacture.

Flame-retardant conveyor belts should use splice materials compatible with the parent belt and the required fire-performance class. Hot-vulcanized splicing is generally preferred for critical industrial service.

• Use flame-retardant splice compounds where required.
• Follow the approved step or finger-splice design for the carcass type.
• Control vulcanizing temperature, pressure and cure time.
• Seal splice edges against contamination and moisture.
• Inspect the splice before commissioning and at defined maintenance intervals.

• Verify pulley and structure alignment before belt installation.
• Protect the belt from sharp structural damage during pulling.
• Set take-up tension to the engineered value.
• Commission unloaded or at reduced load where practical.
• Check tracking, drive traction, splice condition and safety devices.
• Verify antistatic grounding and fire-protection systems where applicable.

The exact standard edition and any local mining or fire-safety approval must be stated in the project specification. General-use flame-retardant belts and underground-approved belts are not automatically interchangeable.

World Prime Services Flat Rubber-Canvas Transmission Belt is a traditional multi-ply flat power-transmission belt designed to transfer mechanical power between rotating pulleys through controlled friction and belt tension.

The construction combines multiple layers of rubberized canvas with friction covers and high-adhesion bonding rubber. This architecture provides a balance of tensile strength, flexibility, fatigue resistance, dimensional stability and pulley grip for industrial power-transmission systems.

Typical uses include fans, blowers, pumps, machine tools, agricultural machinery, process equipment, workshops and other mechanical drive systems where a flat friction belt is preferred.

Flat transmission belts transfer torque by friction between the belt and pulley surfaces. The difference between tight-side and slack-side tension creates the effective tangential force that transmits power from the drive pulley to the driven pulley.

Transmission capacity depends on belt speed, pulley diameter, wrap angle, coefficient of friction, pre-tension, center distance and allowable working stress. Excessive tension increases shaft and bearing loads, while insufficient tension can cause slip, heat generation and unstable speed transmission.

RC-TB Standard Series — General-Purpose Rubber-Canvas Transmission Belt. Multi-ply rubberized canvas construction for conventional workshop, agricultural and industrial machinery drives.

RC-TB EP Series — Synthetic-Reinforced Rubber-Canvas Belt. Enhanced low-elongation textile construction for more stable running length and higher mechanical duty.

RC-TB Wrapped Edge Series — Traditional flat transmission belt with protected wrapped edges for improved resistance to edge wear.

RC-TB Cut Edge Series — Precisely cut and sealed belt edges for dimensional control and standard industrial pulley systems.

RC-TB Heavy-Duty Series — High-strength multi-ply construction for large fans, blowers, crushers, pumps and process machinery.

RC-TB Special Compound Series — Engineered rubber-canvas belts for oil, heat, antistatic, weather or other special operating conditions.

The load-bearing section of the belt consists of multiple canvas plies impregnated and bonded with rubber. Each ply contributes tensile capacity while the rubber matrix transfers stress between layers and permits repeated flexing around pulleys.

The following values represent a general engineering envelope. Final dimensions and construction must be selected from actual pulley geometry, transmitted power and operating conditions.

Current ISO 22:1991 specifies principal dimensions and tolerances for flat transmission belts and corresponding pulleys. The standard remains current and was confirmed in 2025.

Flat belts require correct pulley geometry for stable running. Depending on the drive layout, a crowned pulley may be used to assist tracking. Pulley surface condition, finish and balance directly influence belt life, slip and vibration.

The final belt must be selected from actual transmitted power, speed and service factor rather than width alone. High speed increases centrifugal effects and may reduce effective pulley pressure, while low speed requires greater effective tension for the same transmitted power.

Center distance influences belt length, wrap angle, vibration characteristics and available adjustment. ISO 155:2019 provides limiting values for adjustment of centers for belt drives, while ISO 22:1991 covers principal flat-belt and pulley dimensions.

• Define motor power and maximum transmitted load.
• Record drive and driven pulley diameters.
• Record pulley rotational speeds and required speed ratio.
• Measure center distance and available take-up adjustment.
• Confirm pulley face width and preferred belt width.
• Select EP, NN or reinforced textile carcass.
• Define required friction surface and edge construction.
• Specify operating temperature, oil exposure, dust and static-control requirements.

• Verify that drive and driven shafts are parallel.
• Ensure pulley faces are clean, smooth and free of damaging burrs.
• Install the belt without twisting or sharp folding.
• Align pulleys before applying final tension.
• Check that belt width is compatible with pulley face width.
• Run the drive unloaded at low speed and confirm stable tracking before full load.

• Apply only the pre-tension required to prevent slip under maximum operating load.
• Do not over-tension the belt to correct pulley misalignment.
• Use pulley crown and alignment practices appropriate to flat-belt drives.
• Recheck belt tension after initial run-in.
• Monitor bearing temperature after tension adjustment.
• Correct oil contamination or pulley polishing if slip develops.

ISO 22:1991 remains current and was confirmed in 2025. Earlier standalone standards for flat-belt widths, lengths, pulley diameters and pulley crowns were withdrawn and consolidated into ISO 22:1991.

World Prime Services Heat-Resistant Conveyor Belt is engineered for continuous and intermittent conveying of hot bulk materials where conventional rubber covers may harden, crack, soften, blister or lose adhesion under thermal exposure.

The belt combines heat-resistant rubber compounds with a thermally stable adhesion system and a selected textile or steel-cord tension member. Typical conveyed materials include cement clinker, sintered ore, coke, foundry sand, hot ash, fertilizer products and other elevated-temperature bulk solids.

Selection must consider material temperature, peak temperature, particle size, contact duration, belt speed, loading profile, ambient conditions and cooling between loading cycles.

Heat reaches the belt through conduction from the conveyed material and through radiant heat from the process environment. The top cover is the first thermal barrier; its compound and thickness are therefore critical to carcass protection and belt life.

Heat-resistant belting should be selected from the real thermal duty rather than nominal material temperature alone. Large hot lumps, slow belt speed and continuous contact can create more severe cover temperatures than fine material conveyed at higher speed.

Typical construction uses a heat-resistant top cover, heat-stable skim rubber, a load-bearing carcass, optional breaker reinforcement and a heat-resistant bottom cover.

HR-1 Series — Heat-resistant fabric belt for moderate elevated-temperature bulk handling.

HR-2 Series — Higher thermal-duty construction for clinker, coke, sinter and similar materials.

HR-3 Series — Severe thermal-duty belt using premium heat-resistant cover and adhesion compounds.

HT Series — Engineered high-temperature belt for severe or intermittent peak-temperature exposure.

HR-ST Series — Heat-resistant steel cord construction for long-distance, high-tension and heavy-load hot-material conveying.

HR-AR Series — Heat-resistant anti-rip construction with optional breaker or transverse reinforcement.

Heat-resistant cover compounds are formulated to retain useful mechanical properties after thermal ageing. Compound selection targets resistance to hardening, cracking, softening, swelling and premature loss of tensile strength or elongation.

Premium formulations may use heat-stable elastomer systems selected according to required temperature resistance and service conditions. Final compound chemistry is application-specific.

EP fabric is widely suited to heat-resistant conveyor belts because of its dimensional stability, low elongation and good load-carrying performance. High-strength textile constructions are available for heavier service, while steel cord carcasses may be used for high-tension long-distance systems.

Primary applications include cement plants, clinker handling, steel mills, sinter plants, coke plants, foundries, metallurgical facilities, fertilizer plants, power generation and other industrial processes handling hot bulk solids.

Temperature ratings must be treated as project-specific engineering values. Continuous material temperature, intermittent peak temperature and actual belt-surface temperature are different parameters and should not be used interchangeably.

Where material exceeds the selected belt capability, engineering controls such as cooling, shorter contact time, reduced lump size, improved loading distribution or alternative belt technology should be evaluated.

Cover thickness, carcass construction, pulley diameter, transition geometry, belt speed and take-up design must be coordinated. Thermal ageing can reduce cover flexibility and adhesion, making correct pulley sizing and maintenance especially important.

Hot-vulcanized splicing is generally preferred for critical heat-resistant belt service. Splice compounds must be thermally compatible with the parent belt. Cure parameters and splice geometry must follow the approved belt construction and project specification.

Conveyor alignment, pulley condition, loading-zone geometry and take-up setting should be verified before commissioning. Initial operation should include monitoring of tracking, belt-surface temperature, splice condition and localized hot spots.

Routine inspection should focus on cover hardening, cracking, blistering, delamination, carcass exposure, splice degradation and localized thermal damage. Infrared temperature monitoring can support identification of abnormal thermal zones.

Quality control should include dimensional inspection, carcass verification, cover physical-property testing, adhesion testing, thermal-ageing evaluation and production traceability.

ISO 4195:2012 specifies requirements and test methods for the relative heat resistance of rubber conveyor-belt covers, including permissible changes in hardness, elongation at break and tensile strength after heat exposure. It applies to belts with cover thickness of at least 4 mm. A third edition is under publication in 2026 and is intended to replace the 2012 edition.

World Prime Services High-Temperature Resistant Conveyor Belt is engineered for conveying hot bulk materials under thermal conditions that exceed the practical capability of conventional general-purpose rubber belting.

The product family uses high-temperature-resistant EPDM or EPM-based cover systems, thermally stable adhesion compounds and selected load-bearing carcasses. The belt is intended for demanding applications including cement clinker, sintered ore, coke, foundry materials, hot ash, metallurgical products and other elevated-temperature bulk solids.

The final belt specification must be based on actual material temperature, belt-surface temperature, contact duration, particle size, loading frequency, belt speed, cooling interval, ambient temperature and mechanical duty.

High-temperature belt selection must distinguish between continuous conveyed-material temperature, short-duration peak material temperature and the actual temperature reached by the rubber cover. These values are not interchangeable.

A belt may encounter very hot particles or lumps for a limited period while the moving belt, material bed depth, ambient airflow and return run allow partial cooling. Therefore, a stated peak material temperature of up to 400°C must not be interpreted as a claim that EPDM or EPM rubber can operate continuously at 400°C.

EPDM — ethylene propylene diene monomer — is widely used in heat-resistant conveyor-belt compounds because of its strong resistance to heat ageing, ozone, weathering and many polar media. In conveyor-belt service, the practical temperature capability depends on the complete compound formulation, curing system, cover thickness and duty cycle.

EPM — ethylene propylene rubber without the diene termonomer used in EPDM — belongs to the ethylene-propylene elastomer family and is valued for heat, ozone and weather resistance. Because EPM has a saturated polymer backbone, its curing chemistry and compound design differ from EPDM.

For high-temperature conveyor belting, EPM-based formulations should be treated as engineered compounds rather than assigned a universal temperature limit. Depending on formulation and validation, EPM systems can be positioned for severe continuous thermal duty, with short-duration material peaks substantially above the normal continuous service range.

The following World Prime Services grade architecture is an engineering selection framework rather than a universal polymer limit. Final acceptance temperatures must be confirmed against approved compound data and operating conditions.

The 400°C figure in this catalogue refers exclusively to possible peak temperature of the conveyed material in a specially engineered, intermittent exposure scenario. It is not a 400°C continuous operating temperature for the rubber cover.

Suitability for such peaks depends on contact time, particle size, material bed depth, belt speed, loading pattern, top-cover thickness, thermal conductivity, cooling interval and carcass temperature. Direct continuous contact with material at 400°C can rapidly damage organic elastomers and must not be specified without project-specific thermal validation.

EP fabric is a preferred textile carcass option for high-temperature conveyor belts because of its low elongation and dimensional stability. High-strength EP constructions may be used for heavier duty. Steel cord construction can be engineered for long-distance, high-tension systems where the thermal package is compatible with the carcass and splice design.

The top cover must provide both thermal resistance and mechanical durability. High-temperature cover performance is only effective if the skim and adhesion system also retains bond strength under thermal cycling. Cover thickness should therefore be selected as part of the complete thermal barrier.

HT-EPDM Series — High-temperature belt using EPDM-based cover compounds.

HT-EPM Series — Specialized high-temperature belt using EPM-based cover technology.

HT-EPDM AR Series — EPDM heat-resistant belt with optional anti-rip or breaker reinforcement.

HT-EPM Severe Duty Series — EPM-based system for demanding thermal cycling.

HT-ST Series — High-temperature steel cord belt for high-tension project-specific service.

HT-400 PEAK Series — Specially engineered belt package for brief conveyed-material temperature peaks approaching 400°C, subject to thermal validation.

Material temperature should not be used as the sole belt-selection criterion. The rubber cover may run cooler than the conveyed material when contact is brief and cooling is effective, or it may accumulate damaging heat when exposure is continuous. Surface-temperature measurement during trial operation is strongly recommended for severe applications.

Thermal ageing can increase hardness, reduce elongation, reduce tensile properties and weaken adhesion. Belt life is influenced by thermal cycling as well as mechanical wear. Monitoring changes in cover hardness, cracking and splice condition provides useful evidence of ageing severity.

Large hot lumps combine thermal shock with mechanical impact. Loading-zone design should minimize drop height, control impact energy and distribute material across the belt. Breaker reinforcement may be specified where hot sharp lumps create penetration or rip risk.

Minimum pulley diameter, transition distance and take-up design must match carcass construction and belt thickness. Heat ageing can reduce flexibility, making correct pulley sizing particularly important for long-term belt integrity.

Hot-vulcanized splicing is generally preferred for critical high-temperature service. Splice rubber, skim compounds and cover compounds must be thermally compatible with the parent belt. The splice design and cure parameters must follow the approved belt construction.

Verify conveyor alignment, pulley condition, loading-zone geometry and take-up settings before commissioning. During initial hot operation, monitor belt tracking, splice condition, belt-surface temperature and localized thermal hot spots.

ISO 4195:2012 remains the published ISO reference for conveyor belts with heat-resistant rubber covers, specifying requirements and test methods based on changes in properties after heat exposure. A technically revised third edition was in the final-draft / under-development process in 2026, including a proposed Class 4 test level at 175°C.

Technical Note — Temperature Claims

EPDM and EPM temperature capability is compound-specific. The catalogue ranges are engineering selection bands based on published conveyor-belt industry practice and must not be interpreted as universal polymer ratings. Any reference to 400°C means a brief peak temperature of conveyed material under specially engineered intermittent conditions; it does not mean continuous EPDM or EPM rubber operation at 400°C.

Final belt approval must be based on validated compound data, applicable heat-ageing tests, conveyor operating conditions and the customer's approved technical specification.

World Prime Services Nylon (NN) Conveyor Belt is a multi-ply rubber conveyor belt using nylon fabric as the principal tension-bearing carcass. The construction is designed for applications requiring high flexibility, strong impact absorption, good troughability and resistance to repeated dynamic flexing.

NN belting is particularly suitable for medium- to heavy-duty bulk handling where impact loading, shorter pulley transitions and frequent bending cycles are important design considerations. Typical applications include mining, quarries, aggregates, cement, ports, metallurgy, power generation and general industrial conveying.

NN denotes a nylon/nylon textile carcass in which nylon yarns are used in both warp and weft directions. The carcass provides high flexibility and strong resistance to shock and impact. Compared with polyester-based EP carcasses, nylon constructions generally exhibit higher elastic elongation and therefore require adequate take-up allowance.

The standard construction combines a wear-resistant top cover, high-adhesion skim rubber, multiple NN fabric plies and a rubber bottom cover. Cover compounds can be selected for abrasion, oil, heat, flame, cold or other project-specific service conditions.

Common industry NN fabric designations include NN100, NN150, NN200, NN250, NN300 and NN400. These designations are used as carcass strength identifiers in the conveyor-belt market. Final rated belt strength depends on the fabric class, number of plies and approved construction.

High flexibility supports repeated bending around pulleys. Strong impact absorption makes NN belts suitable for lump materials and demanding loading zones. Good troughability supports stable bulk-material containment on troughed idlers. High inter-ply adhesion is essential for dynamic durability.

NN and EP belts should be selected according to conveyor geometry and operating duty. NN is attractive where flexibility and impact resistance are priorities; EP is generally preferred where lower longitudinal elongation and greater dimensional stability are required.

Loading-zone design should minimize uncontrolled drop height and concentrated impact. For sharp or heavy lumps, additional breaker or anti-rip reinforcement may be specified. Skirt-board adjustment and impact-bed condition should be maintained to prevent cover cutting and carcass damage.

Correct troughability depends on belt width, carcass stiffness, ply count and idler trough angle. Conveyor alignment, idler condition and centered loading are critical to stable tracking. Excessive edge tension or poor transition design can shorten carcass life.

Minimum pulley diameter must be selected for the actual belt construction and tension rating. Because nylon carcasses typically have greater elastic elongation than EP carcasses, sufficient take-up travel should be incorporated into the conveyor design.

Hot-vulcanized splicing is generally preferred for critical heavy-duty service. Splice geometry, step length, cover rubber and skim materials must match the belt construction. Mechanical fasteners may be used only where permitted by the application and operating conditions.

Before installation, verify conveyor alignment, pulley condition, idler rotation and loading-zone geometry. Commission the belt under controlled conditions, check tracking and take-up position, then progressively introduce operating load.

ISO 14890:2026 is the current international reference for rubber- or plastics-covered conveyor belting of textile construction for general surface use on flat or troughed idlers. The 2026 edition supersedes ISO 14890:2013.

Project specifications may additionally reference applicable DIN, EN, RMA, AS or customer-specific requirements. The exact standard, cover grade and acceptance criteria should be stated at enquiry and purchase-order stage.

World Prime Services Oil-Resistant Conveyor Belt is engineered for conveying bulk materials containing mineral oils, lubricants, greases, vegetable oils, animal fats and selected hydrocarbon contaminants that can prematurely degrade conventional rubber conveyor-belt covers.

The product family uses nitrile-butadiene rubber (NBR) or engineered oil-resistant rubber compounds as the primary cover system. The objective is to reduce oil-induced swelling, softening, loss of tensile properties, surface tackiness, cover cracking and deterioration of cover-to-carcass adhesion.

The range can be engineered in EP or NN fabric constructions for general industrial service and in steel cord construction for long-distance, high-tension or high-capacity systems.

Oils and hydrocarbon liquids can diffuse into conventional rubber compounds, causing volume increase, loss of hardness, surface softening and reduced mechanical strength. In severe cases, oil can also affect adhesion between the cover and reinforcement.

Oil-resistant conveyor belts use specially selected elastomers and compounding systems that limit absorption and preserve useful physical properties under defined exposure conditions. NBR is widely used because of its strong resistance to many mineral oils, lubricants and hydrocarbon-based products.

No single oil-resistant compound is universally compatible with all oils, fuels, solvents or chemicals. Final selection must consider the exact oil type, aromatic content, concentration, temperature and contact duration.

NBR — nitrile-butadiene rubber — is the principal elastomer family used for many industrial oil-resistant conveyor-belt covers. The acrylonitrile content and complete compound formulation influence oil resistance, flexibility, low-temperature behavior, abrasion resistance and processing characteristics.

OR-EP Series — Oil-Resistant EP Fabric Conveyor Belt. Low-elongation EP carcass for general and heavy-duty oily bulk-material conveying.

OR-NN Series — Oil-Resistant Nylon Fabric Conveyor Belt. Flexible, impact-tolerant construction for medium-duty and impact-oriented service.

OR-ST Series — Oil-Resistant Steel Cord Conveyor Belt. High-tensile, low-elongation belt for long-distance and high-capacity applications.

OR-AR Series — Oil & Abrasion Resistant Belt. Optimized for oily materials that are also abrasive.

OR-H Series — Oil & Moderate Heat Resistant Belt. Engineered for applications combining oil exposure with elevated temperature.

OR-X Series — Engineered Severe Oil Duty. Project-specific compound selection for high oil concentration, elevated temperature or prolonged contact.

Oil-resistant steel cord conveyor belts combine NBR-based or engineered oil-resistant covers with a galvanized steel cord tension carcass. This construction is selected where high tensile strength, low elongation and long-distance conveying are required.

Oil resistance must be evaluated against the actual service medium. Mineral oil, hydraulic oil, lubricants, vegetable oils and animal fats can affect rubber differently. Aromatic hydrocarbon content and elevated temperature can significantly increase rubber swelling.